Improved speed and comprehensiveness

Edited templates location, removed unnecessary CSS and JS files, moved the onePageApp style and scripts into respective files, modified variable names for better comprehension.
TODO next: add comments to the code.

css/hidden-scrollbar-GUI.css

@@ -0,0 +1,6 @@
+html,body {
+    scrollbar-width: none;
+}
+::-webkit-scrollbar {
+    width: 0;
+}